US5682944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant condenser
Assignee: Denso Corp
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Filing: 1995-06-23
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Granted: 1997-11-04
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Expires: 2015-06-23
Abstract
Abstract A refrigerant condenser is set so that, if its condensation distance is L, the equivalent diameter of a tube having a linearly configured passage for the purpose of heat exchange is de (each dimension being in units of mm), and the number of times the direction change of the linearly configured passage for the purpose of heat exchange change is N, with de≦1.15 and the relationship L=(N+1)W=400+1,180 de to 700+1,180 de satisfied, a high heat exchange efficiency is achieved. In this refrigerant condenser, it is possible to use a single long winding tube.
Inventors
- 👤 Michiyasu Yamamoto
- 👤 Ken Yamamoto
- 👤 Ryouichi Sanada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:43
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D1/0535; F28D1/05366; F28D1/05391; F25; F25B; F25B39/00; F25B39/04; F28D1/047; F28D1/0477; F28D1/0478; F25B2339/00; F25B2339/04; F25B2339/044; F25B2500/00; F25B2500/01; F28D21/00; F28D2021/0019; F28D2021/008; F28D2021/0084; Y; Y10; Y10S; Y10S165/00; Y10S165/184; Y10S165/217; Y10S165/221; Y10S165/222
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
190 words
A refrigerant condenser for use in a vehicle air-conditioner, the condenser comprising: a pair of headers which form an inlet and an outlet for refrigerant, and at least one tube which forms an internal passage through which refrigerant is caused to flow, said at least one tube being connected to each header, wherein at least part of said passage forms a linearly configured passage for the purpose of heat exchange, wherein when the number of times the direction change of flow of refrigerant within said tube in flowing toward the linearly configured passage is N, the effective heat exchange width of said linearly configured passage is W (in units of mm), the condensation distance of the refrigerant is L (in units of mm), and the equivalent diameter of said linearly configured passage is de (in units of mm), the width W being within the range of 300 to 800 mm, the equivalent diameter de of said linearly configured passage is 1.15 or smaller, and further is set so as to satisfy the condition defined by the relationship ##EQU3## with the number N being an integer rounded from the expression (L/W)-1.
Claim 2
Dependent Claim
190 words
A refrigerant condenser for use in a vehicle air-conditioner, the condenser comprising: a pair of headers which form an inlet and an outlet for refrigerant, and at least one tube which forms an internal passage through which refrigerant is caused to flow, said at least one tube being connected to each header, wherein at least part of said passage forms a linearly configured passage for the purpose of heat exchange, wherein when the number of times the direction change of flow of refrigerant within said tube in flowing toward the linearly configured passage is N, the effective heat exchange width of said linearly configured passage is W (in units of mm), the condensation distance of the refrigerant is L (in units of mm), and the equivalent diameter of said linearly configured passage is de (in units of mm), the width W being within the range of 300 to 800 mm, the equivalent diameter de of said linearly configured passage is 1.15 or smaller, and further is set so as to satisfy the condition defined by the relationship ##EQU3## with the number N being an integer rounded from the expression (L/W)-1.
Claim 3
Dependent Claim
56 words
A refrigerant condenser according to claim 1, wherein said tube is formed from long tube which is substantially jointless, said tube being bent so that its direction reverses over a prescribed width, so that it forms one or more winding tubes which have a plurality of said linearly configured passages for the purpose of heat exchange.
Claim 4
Dependent Claim
24 words
A refrigerant condenser according to claim 2, wherein the equivalent diameter de (in units of mm) of said tube satisfies the relationship 0.60≦de ≦1.15.
Claim 5
Dependent Claim
15 words
A refrigerant condenser according to claim 2, wherein said tube has a flat cross section.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-03 | 2001-05-05 | 2001-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-03 | 2005-05-05 | 2005-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-03 | 2009-05-05 | 2009-11-04 | $7700.00 | Window Closed / Lapsed |